RECONSIDERATION OF MACROSCOPIC LOW CYCLE FATIGUE LAWS THROUGH OBSERVATION OF MICROSCOPIC FATIGUE PROCESS ON A MEDIUM CARBON STEEL.

Shoji Harada, Yukitaka Murakami, Yoshihiro Fukushima, Tatsuo Endo

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

3 被引用数 (Scopus)

抄録

In order to correlate macroscopic low-cycle fatigue laws such as the Manson-Coffin relation and Miner's rule with the actual microscopic fatigue process, cyclic strain-controlled low-cycle fatigue tests were conducted on a medium carbon steel under constant-, two-step-, and random-strain amplitude conditions. Through continual observation of the microscopic fatigue process of plain specimens and holed specimens with a very small hole (40 mu m diameter), it was found that the total fatigue life is mostly occupied by the microcrack propagation life. Both the Manson-Coffin relation and Miner's rule are derived using the microcrack propagation law. Then, background for the applicability of Miner's rule is discussed. The results of the random loading fatigue tests showed that microcrack propagation life can be predicted on the basis of the microcrack growth law in conjunction with the rain flow method for counting fatigue damage. Finally, the microcrack growth law-aided approach was applied to interpret anisotropy in fatigue strength of a thick forged steel plate.

本文言語英語
ホスト出版物のタイトルASTM Special Technical Publication
編集者H.D. Solomon, G.R. Halford, L.P. Kaisand, B.N. Leis
出版社ASTM
ページ1181-1198
ページ数18
ISBN(印刷版)080310944X
出版ステータス出版済み - 12 1 1987
外部発表はい
イベントASTM Spec Tech Publ 942, Low Cycle Fatigue, a Symp - Bolton Landing, NY, USA
継続期間: 9 30 19879 30 1987

出版物シリーズ

名前ASTM Special Technical Publication

その他

その他ASTM Spec Tech Publ 942, Low Cycle Fatigue, a Symp
CityBolton Landing, NY, USA
Period9/30/879/30/87

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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